Qatar is a sovereign state located on the Eastern coast of the Arabian Peninsula in the Persian Gulf. Its native population consists of 3 major subgroups: people of Arabian origin or Bedouins, those from an Eastern or Persian ancestry and individuals with African admixture. Historically, all types of consanguineous marriages have been and still are common in the Qatari population, particularly ...

A modification of Smith's method is described for deriving recurrence risks for multifactorial conditions when parents are related. Using cleft palate as an example, the possible increased risks caused by consanguinity are discussed.

Consanguineous marriages have a high prevalence among Muslim-majority countries, and the ratio is increasing in Saudi population [1]. Nowadays, more than half of all the marriages in Saudi Arabia are marriages between cousins [2]. Different types of consanguineous marriages exist, such as marriage between first cousins, which is the most common one, marriage between second cousins, and marriage...